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// Licensed to the Apache Software Foundation (ASF) under one // or more contributor license agreements. See the NOTICE file // distributed with this work for additional information // regarding copyright ownership. The ASF licenses this file // to you under the Apache License, Version 2.0 (the // "License"); you may not use this file except in compliance // with the License. You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, // software distributed under the License is distributed on an // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY // KIND, either express or implied. See the License for the // specific language governing permissions and limitations // under the License. #pragma once #include #include "parquet/encryption/encryption.h" #include "parquet/encryption/file_key_wrapper.h" #include "parquet/encryption/key_toolkit.h" #include "parquet/encryption/kms_client_factory.h" #include "parquet/platform.h" namespace parquet::encryption { static constexpr ParquetCipher::type kDefaultEncryptionAlgorithm = ParquetCipher::AES_GCM_V1; static constexpr bool kDefaultPlaintextFooter = false; static constexpr bool kDefaultDoubleWrapping = true; static constexpr double kDefaultCacheLifetimeSeconds = 600; // 10 minutes static constexpr bool kDefaultInternalKeyMaterial = true; static constexpr bool kDefaultUniformEncryption = false; static constexpr int32_t kDefaultDataKeyLengthBits = 128; struct PARQUET_EXPORT EncryptionConfiguration { explicit EncryptionConfiguration(const std::string& footer_key) : footer_key(footer_key) {} /// ID of the master key for footer encryption/signing std::string footer_key; /// List of columns to encrypt, with column master key IDs (see HIVE-21848). /// Format: "columnKeyID:colName,colName;columnKeyID:colName..." /// Either /// (1) column_keys must be set /// or /// (2) uniform_encryption must be set to true /// If none of (1) and (2) are true, or if both are true, an exception will be /// thrown. std::string column_keys; /// Encrypt footer and all columns with the same encryption key. bool uniform_encryption = kDefaultUniformEncryption; /// Parquet encryption algorithm. Can be "AES_GCM_V1" (default), or "AES_GCM_CTR_V1". ParquetCipher::type encryption_algorithm = kDefaultEncryptionAlgorithm; /// Write files with plaintext footer. /// The default is false - files are written with encrypted footer. bool plaintext_footer = kDefaultPlaintextFooter; /// Use double wrapping - where data encryption keys (DEKs) are encrypted with key /// encryption keys (KEKs), which in turn are encrypted with master keys. /// The default is true. If set to false, use single wrapping - where DEKs are /// encrypted directly with master keys. bool double_wrapping = kDefaultDoubleWrapping; /// Lifetime of cached entities (key encryption keys, local wrapping keys, KMS client /// objects). /// The default is 600 (10 minutes). double cache_lifetime_seconds = kDefaultCacheLifetimeSeconds; /// Store key material inside Parquet file footers; this mode doesn’t produce /// additional files. By default, true. If set to false, key material is stored in /// separate files in the same folder, which enables key rotation for immutable /// Parquet files. bool internal_key_material = kDefaultInternalKeyMaterial; /// Length of data encryption keys (DEKs), randomly generated by parquet key /// management tools. Can be 128, 192 or 256 bits. /// The default is 128 bits. int32_t data_key_length_bits = kDefaultDataKeyLengthBits; }; struct PARQUET_EXPORT DecryptionConfiguration { /// Lifetime of cached entities (key encryption keys, local wrapping keys, KMS client /// objects). /// The default is 600 (10 minutes). double cache_lifetime_seconds = kDefaultCacheLifetimeSeconds; }; /// This is a core class, that translates the parameters of high level encryption (like /// the names of encrypted columns, names of master keys, etc), into parameters of low /// level encryption (like the key metadata, DEK, etc). A factory that produces the low /// level FileEncryptionProperties and FileDecryptionProperties objects, from the high /// level parameters. class PARQUET_EXPORT CryptoFactory { public: /// a KmsClientFactory object must be registered via this method before calling any of /// GetFileEncryptionProperties()/GetFileDecryptionProperties() methods. void RegisterKmsClientFactory(std::shared_ptr kms_client_factory); /// Get the encryption properties for a Parquet file. /// If external key material is used then a file system and path to the /// parquet file must be provided. std::shared_ptr GetFileEncryptionProperties( const KmsConnectionConfig& kms_connection_config, const EncryptionConfiguration& encryption_config, const std::string& file_path = "", const std::shared_ptr<::arrow::fs::FileSystem>& file_system = NULLPTR); /// Get decryption properties for a Parquet file. /// If external key material is used then a file system and path to the /// parquet file must be provided. std::shared_ptr GetFileDecryptionProperties( const KmsConnectionConfig& kms_connection_config, const DecryptionConfiguration& decryption_config, const std::string& file_path = "", const std::shared_ptr<::arrow::fs::FileSystem>& file_system = NULLPTR); void RemoveCacheEntriesForToken(const std::string& access_token) { key_toolkit_->RemoveCacheEntriesForToken(access_token); } void RemoveCacheEntriesForAllTokens() { key_toolkit_->RemoveCacheEntriesForAllTokens(); } /// Rotates master encryption keys for a Parquet file that uses external key material. /// In single wrapping mode, data encryption keys are decrypted with the old master keys /// and then re-encrypted with new master keys. /// In double wrapping mode, key encryption keys are decrypted with the old master keys /// and then re-encrypted with new master keys. /// This relies on the KMS supporting versioning, such that the old master key is /// used when unwrapping a key, and the latest version is used when wrapping a key. void RotateMasterKeys(const KmsConnectionConfig& kms_connection_config, const std::string& parquet_file_path, const std::shared_ptr<::arrow::fs::FileSystem>& file_system, bool double_wrapping = kDefaultDoubleWrapping, double cache_lifetime_seconds = kDefaultCacheLifetimeSeconds); private: ColumnPathToEncryptionPropertiesMap GetColumnEncryptionProperties( int dek_length, const std::string& column_keys, FileKeyWrapper* key_wrapper); /// Key utilities object for kms client initialization and cache control std::shared_ptr key_toolkit_ = std::make_shared(); }; } // namespace parquet::encryption